Order Of Draw Quantiferon - Web four tubes must be collected for each patient: Web specimen collection times will vary depending on logistics from the blood draw location to a labcorp lab. Gray cap tube (nil control), green cap tube (tb1 antigen), yellow cap.
Web four tubes must be collected for each patient: Web specimen collection times will vary depending on logistics from the blood draw location to a labcorp lab. Gray cap tube (nil control), green cap tube (tb1 antigen), yellow cap.